453991 has 2 divisors, whose sum is σ = 453992. Its totient is φ = 453990.

The previous prime is 453983. The next prime is 454009. The reversal of 453991 is 199354.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 453991 - 2³ = 453983 is a prime.

It is a super-2 number, since 2×453991² = 412215656162, which contains 22 as substring.

453991 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (453931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 226995 + 226996.

It is an arithmetic number, because the mean of its divisors is an integer number (226996).

2⁴⁵³⁹⁹¹ is an apocalyptic number.

453991 is a deficient number, since it is larger than the sum of its proper divisors (1).

453991 is an equidigital number, since it uses as much as digits as its factorization.

453991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 31.

The square root of 453991 is about 673.7885424968. The cubic root of 453991 is about 76.8568205630.

It can be divided in two parts, 453 and 991, that added together give a square (1444 = 38²).

The spelling of 453991 in words is "four hundred fifty-three thousand, nine hundred ninety-one".